Lingual bar pattern



May 19, 1925.

F. TAVI LINGUAL BAR PATTERN Filed NOV. 14, 1924 INVENTOR Patented May 19, 1925.

UNITED STATES FELIX TAvI, oF NEW YORK, N. Y.

LINGUAL BAR PATTERN.

Application filed November 14, 1924. Serial No. 749,844.

To all whom it may concern.'

Be it known that I, FELIX TAVI, a citizen of Finland, residing in the borough of Manhattan, city, county, and State of New York, have invented an Improvement in Lingual Bar Patterns, of which the following is a specification.

Heretofore, sofar Vas I am aware, lingual bars as employed in dentistry have been constructed lof strips of metal and shaped to the desired configuration as welll as could be done from an impression of the mouth of the patient. In practice considerable difliculty has been experienced in properly shaping these lingual bars and in doing so there is the ever present liability of injuring or breaking the bar. Furthermore in the use of these bars in accordance with the present practice it is almost impossible to properly shape the same to make them conform to the gum of the patient in such a manner as tobe entirely satisfactory. 4

The object of my present invention is to overcome these difliculties and in carrying out the same I employ a lingual bar pattern made of suitable wax or other pliable material having a relatively low melting point. This article is made in any suitable manner so as to comprise a body portion or strip having posts adjacent the ends thereof and preferably loops at theextremities so that the pliable pattern may befitted on the model which isa reproduction of the mouth of the patient and madeto co-nform exactly with the position it is desired to assume in use. When this bar pattern is thus fitted it is employed as hereinafter described to cast a metal lingual bar therefrom which, as will be understood, is of the same configuration and therefore when the bar is made no further fitting' is necessary, the bar proper being secured to the clasps or attachments of any kind .which fit over or into predetermined teeth and theartificial teeth being secured to the bar at the ends thereof on gold or rubber saddles and attachments or otherwise in the usual manner, as will be hereinaftermore particularly described.

In the drawing; l

Fig. 1 is a plan of a lingual bar pattern made in accordance withmy present invention and showing the manner in which the same is fitted to a model or impression of the gums of the patient.

Fig. 2 is an elevation of the lingual bar pattern.

Fig. 3 is a section taken on line 3 3, Fig. 2. 'l l Fig. 4 is a sectional elevation showing a mold inv which the lingual bar pattern is placed to form the metallic lingual bar. Y

Fig. 5'is an elevation showing the lingual bar as cast from the lingual bar pattern.

Fig. 6 is a sectional elevation illustrating the cross section of the body member of the lingual bar and showing the position the same assumes relatively to the gums of the patient when in place in themouth.

Fig. 7 is an elevation of an end portion of the lingual bar showing themanner in which the post adjacent the extremity thereof is attached to a clasp to be fitted over a tooth in order to secure the bar in position in the mouth.v

Fig. 8 is an elevationof an end portion of the lingual barshowing the manner in which the same is connected to avrubber saddle, i

and

Fig. 9 is asimilar view illustrating the manner in which the end of the lingual bar 1s connected to a gold saddle.

By reference to the drawing, it will be seen that this invention relates to a lingual bar pattern. This lingual bar pattern may be made in various manners and of the necessary number of sizes and lengths ,for adequately practicing the invention, and the lingual bar pattern is preferably made'of wax yor other similar pliable material having a relatively low lmelting point. As illustrated, the lingual bar-pattern comprises w a body member or portion 10 adjacent the extremities of which there areposts 11 and 12 and at the extremities of which the same is provided with loops 13 and 14. -The body member or portion of the lingual bar pattern is preferably tapered as indicated at 15 along the outer upper edge thereof so, as will be understood, as to present a relatively smallerl obstruction to the tongue of the patient than would otherwise be the case. This lingual bar pattern may be constructed with the loops 13 and v14 as illustrated for the purpose of employing the same with a rubber saddle, as hereinafter explained, or the lingual bar pattern may be lconstructed so as to terminate with the posts 1'1 and 12 so as to be employed with a gold saddle also as hereinafter more particularly explained.

In the use of this lingual bar pattern the same is fitted to an impressionA or model of the gums of the' mouth of the patient, Athe representation of the gums being illustrated this layer of tin foil for example is placed Aals against the inner portion of the gums as indicated at 18 and the lingual bar pattern fitted over the same so as to conform to the gumiine designated in the model or impression and therefore made to correspond and consequently to fit the gums of the patient.

After thus shaping the lingual bar pattern the same is placed in a suitable mold in orvder to cast the metal lingual bar therefrom. As illustrated in Fig. 41, this mold preferably comprises a ring or annularmember 19 open at both ends and provided with a lid 20adapted to fit the upper end of the ring. This lid is provided witha boss 21 and a centrally disposed opening or passage 22 which is preferably filled with wax or other similar material indicated atr23. After the lingual bar pattern is shaped as hereinbefore described the same is mounted on the point of a pin 24: or similar instrument, which pin is passed through the wax iilling in the vopening in the central portion of the lid so that the lingual bar pattern is supported in a suitable position in* the ring or other annular member forming the mold. These parts are then in the position as illustrated in Fig. 4 in which, as will be understood, the mold vis inverted and rests upon the lid. A suitable investment compound 25 is then made and poured or caused toflow into the ring so as to completely or substantially fill the same. After this investment compound is set the mold is inverted and both the lid and the pin 24 removed. The removal of the lid provides a concavity in the upper portion of the investment compound and the removal of the pin provides an aperture or passage to the lingual ba-r pattern. The gold to form the lingual bar is then placed in this concavity in the upper portion of the investment compound and the mold is heated to a suflicient temperature to burn out the wax lingual bar pattern and then the gold is suitably heated and the molten gold permitted to iiow into the space formerly Y occupied by the lingual bar pattern so as to form the lingual bar itself. This lingual bar when thus'formed of course assumes the same shapeV and dimensions as the lingual bar pattern and as illustrated in Fig. 5 comprises a body member or portion 26, posts 27 and 28 adjacent the ends thereof and loops 2.9V and 30 at the extremities thereof.

In the use of this lingual bar, as hereinbefore described, the posts 27 and 28 are suitably connected to clasps made to fit over predetermined teeth which form anchors for Vthe artificial teeth to be carried by t-he bar. In Fig. 7 for example, the post 28 is shown as connected to a clasp 31. The oppositely disposed post 27 is similarly connected toV another clasp, and as shown in Fig. 1 these clasps are made to fit over the teeth 32 and 33. ith the parts thus formed when in position in the mouth there will be a space 34 between the inner surface of the lingual bar and the gum of the patient.

As illustrated in Fig. 8, when the lingual bar is employed in conjunction with a rubber saddle 35 in which artificial teeth 36 are secured the loop 30 at one extremity of the bar, for example, is embedded and suitably secured in this rubber saddle 35. VIn other instances where, for example as shown in- Fig. 9, a gold lsaddle 37 is employed the loop members at the extremities of the bar may be dispensed with and the end of the bar connected to the adjacent end saddle in any suitable manner, for example-along the line indicated at 3.8 at which these parts are soldered together. The relative position of the body portion of the lingual bar in respect to the gum ofthe patient is illustrated in Fig. 6 by reference to which it will be seen that there is an appreciable space 311 between the inner surface of the bar and the gum as hereinbefore stated, and also that inasmuch as the upper outer surface of the body portion of the bar is tapered as indicated at 15 it will present a materially less obstruction to the tongue of the patient than if the bar, were made semi-circular in cross section as has been the custom heretofore.

From the foregoing it will be understood that by employing the pliable lingual bar pattern and causing the same to conform to the shape and configuration of the gums of the patient by fitting it to a model or impression ofy the mouth before the lingualk bar itself is cast much more satisfactory results may be obtained and with considerably less effort than in attemptingy to fit the metallic bars to the impressions of the mouth.

I claim as my invention: 1. A lingual bar pattern of pliable material having a low melting point comprising a body portion moldable to conform to a reproduction model of the gums of Va patient.

2. A lingual bar pattern of ypliable material having a relatively low melting point comprising a body portion, and posts adjacent the ends of the body portion, the same being readily moldable to conform toa reproduction model of the gums of a patient.`

3. A lingual barpattern of pliable material having a relatively. low melting point comprising a body portion, and loop 'members at the ends thereof, the same being readily moldable to conform to a reproduction model of the gums of a patient.

4. A lingual bar pattern of pliable material having a relatively loW melting point comprising a body portion, posts adjacent the ends thereof, and loops at the extremities of the body portion, the entire pattern being Inoldable to conform to a reproduction model of the gums of a patient.

5. A lingual bar pattern made of Wax having a loW melting point comprising a body portion moldable to conform to a reproduction model of the gums of a patient.

6. A lingual bar pattern made of Wax having a relatively 10W melting point comprising a body portion, and posts adjacent the ends of the body portion, the same being readily moldable to conform to areproduction model of the gums of a patient.

7 A lingual bar pattern made of Wax having a relatively 10W melting point comprising a body portion, and loop members at the ends thereof, the same being readily moldable to conform to a reproduction model of the gums of a patient.

8. A lingual bar pattern made of Wax having a relatively low melting point comprising a body portion, posts adjacent the ends thereof, and loops at the extremities of the body portion, the entire pattern being moldable to conform to a reproduction model of the gums of a patient.

9. A lingual bar pattern of pliable material having a low melting point comprising a body portion which in cross section is substantially flat on its inner side and its outer side is curved and tapered upwardly toward the upper edge thereof, the said body portion being moldable to conform to a reproduction model of the gums of a patient.

Signed by me this 7th day of November, 1924. l

FELIX TAVI. 

